EP 0722825 B1 20030115 - Resin transfer molding in combination with honeycomb core
Title (en)
Resin transfer molding in combination with honeycomb core
Title (de)
Transfer-Giessverfahren in Kombination mit wabenförmigen Kern
Title (fr)
Procédé pour le moulage par transfert de résine en combinaison avec noyau en nid d'abeilles
Publication
Application
Priority
US 36806295 A 19950103
Abstract (en)
[origin: US5851336A] A process for making a layered product having a honeycomb core having empty cells, the process comprising the steps of: (a) placing a first layer of an uncured adhesive film on the top side of a central honeycomb core having empty cells, and placing a second layer of an uncured adhesive film on the bottom side of the central honeycomb core; (b) placing a first layer of an uncured prepreg material above the first layer of uncured adhesive film, and placing a second layer of an uncured prepreg material below the second layer of uncured adhesive film; (c) placing a first layer of a dry fiber preform above the first layer of uncured prepreg material, and placing a second layer of a dry fiber preform below the second layer of uncured prepreg material; (d) placing the charge made by steps (a)-(c) inside a mold and closing the mold; (e) heating the mold to the cure temperature of the adhesive film and the prepreg material, and holding the mold at this temperature for sufficient time to cure the adhesive film and the prepreg material; (f) reducing the temperature of the mold to the injection temperature of a selected resin transfer molding (RTM) resin system, and injecting the selected resin transfer molding (RTM) resin system into the mold; (g) holding the temperature of the mold at the cure temperature for the resin transfer molding (RTM) resin system for sufficient time to cure the resin system; and, (h) removing the product from the mold after curing is completed.
IPC 1-7
IPC 8 full level
B29C 70/08 (2006.01); B29C 70/48 (2006.01); B29C 70/54 (2006.01); B29D 24/00 (2006.01); B32B 3/12 (2006.01)
CPC (source: EP US)
B29C 70/086 (2013.01 - EP US); B29C 70/48 (2013.01 - EP US); B29C 70/542 (2013.01 - EP US); B29D 24/005 (2013.01 - EP US); B32B 3/12 (2013.01 - EP US); B32B 5/26 (2013.01 - US); B32B 7/12 (2013.01 - US); B29L 2007/002 (2013.01 - EP US); B32B 2038/0076 (2013.01 - US); B32B 2260/021 (2013.01 - US); B32B 2260/046 (2013.01 - US); B32B 2305/024 (2013.01 - US); B32B 2605/18 (2013.01 - US); Y10T 428/233 (2015.01 - EP US); Y10T 428/236 (2015.01 - EP US); Y10T 428/239 (2015.01 - EP US); Y10T 428/24149 (2015.01 - EP US); Y10T 428/24661 (2015.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 5851336 A 19981222; DE 69529396 D1 20030220; DE 69529396 T2 20030515; EP 0722825 A2 19960724; EP 0722825 A3 19970115; EP 0722825 B1 20030115; US 5567499 A 19961022
DOCDB simple family (application)
US 71044796 A 19960917; DE 69529396 T 19951030; EP 95202933 A 19951030; US 36806295 A 19950103